Testimonials: What Plant Owners Say About Desulfurizer ROI

For Juan Rodriguez, owner of Lone Star Battery Recycling in San Antonio, Texas, 2022 was a year of frustration. His facility, which processes 300 tons of lead acid batteries monthly using lead acid battery recycling equipment , was drowning in challenges: frequent shutdowns due to sulfur buildup in furnaces, sky-high emissions that triggered EPA warnings, and a 12% loss of recoverable lead to inefficiency. "We were spending $15,000 a month on furnace repairs and another $8,000 on emissions-related fines," Rodriguez recalls. "I was ready to scale back, but then a mentioned integrating a desulfurization unit with an air pollution control system . I was skeptical—another big expense—but we had to try."

Rodriguez's team installed a rotary furnace with a desulfurization unit in early 2023, paired with an upgraded air pollution control system to capture residual emissions. The change was immediate. "Within the first month, furnace downtime dropped by 70%," he says. "Sulfur buildup used to require a full day of cleaning every two weeks; now it's once a month, and it takes half the time." More importantly, emissions plummeted: sulfur dioxide levels fell from 250 ppm to 35 ppm, well below the EPA's 50 ppm limit. "No more fines. That alone saved us $96,000 in the first year."

Today, Lone Star processes 375 tons monthly, a 25% increase, without adding staff. "We're not just compliant—we're thriving," Rodriguez says. "The desulfurization unit turned a struggling operation into one that's expanding. Next year, we're adding lithium battery recycling equipment, and you better believe we'll include desulfurization from day one."

Before & After: Lone Star's Key Metrics

Over in Fremont, California, Mei Chen's facility, GreenTech Lithium Recovery, specializes in lithium battery recycling equipment , processing 200 tons of Li-ion batteries monthly for automakers and consumer electronics brands. For Chen, the problem wasn't just emissions—it was the quality of the recycled materials. "Lithium batteries contain sulfur compounds from electrolytes, and they were contaminating our cobalt and nickel extracts," she explains. "Our buyers were rejecting 15% of our output for high sulfur content, costing us $40,000 a month in lost sales."

In mid-2023, Chen invested in a lithium battery breaking and separating system with an integrated desulfurization unit. "We were already using advanced li-ion battery breaking and separating equipment , but the desulfurization piece was missing," she says. "The unit uses a chemical scrubbing process to strip sulfur from the material stream before it reaches the separators. Within three months, our reject rate dropped to 3%."

The impact on yields was equally impressive. "Previously, we recovered 85% of the lithium in each battery; now it's 94%," Chen notes. "With lithium prices hovering around $20,000 per ton, that's an extra $18,000 a month. Add in the $40,000 from fewer rejected batches, and we're seeing $58,000 more in monthly revenue."

Chen's team also noticed secondary benefits: less corrosion in their separators, reducing maintenance costs by $6,000 a year, and smoother integration with their plastic pneumatic conveying system, which now runs 10% faster without sulfur clogs. "Every part of the process works better because the sulfur is gone," she says. "I'd recommend this to any lithium recycler—your materials will be purer, your clients happier, and your bank account healthier."

At Midwest E-Waste Solutions in Detroit, Michigan, Raj Patel's focus is circuit board recycling equipment , processing 250 tons of e-waste monthly to recover gold, silver, and copper. For years, his biggest challenge was sulfur from flame retardants in circuit boards. "Sulfur would bond with the metals during smelting, making them brittle and less valuable," Patel says. "A refiner once told me our copper was 'good for scrap, not for reuse'—that stung."

Patel's solution? A circuit board recycling plant with dry separator (500-2000kg/hour capacity) paired with a compact desulfurization unit. "The desulfurization unit treats the circuit board fragments before they enter the smelter, neutralizing sulfur compounds," he explains. "The first batch after installation? The refiner called to say, 'This is the purest copper we've gotten from you—send more.'"

The upgrade boosted the value of Patel's output dramatically. "Previously, our copper sold for $3.20 per pound as 'scrap grade'; now it's $4.10 per pound as 'reuse grade,'" he says. "With 15 tons of copper recovered monthly, that's an extra $27,000 a month. Gold and silver purity also rose by 5%, adding another $8,000 monthly."

Compliance improved too. "Our air pollution control system used to struggle with sulfur dioxide spikes," Patel notes. "Now, emissions are steady at 20 ppm, well under the state's 40 ppm limit. We even qualified for a green business tax credit, saving $12,000 a year."

Today, Midwest E-Waste is expanding into cable recycling equipment , and Patel plans to add desulfurization there as well. "Sulfur is the silent profit killer in recycling," he says. "If you're not addressing it, you're leaving money on the table."